Magnetron, and microwave oven and high-frequency heating apparatus each equipped with the same

(19)

(11)

EP 1 429 365 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	13.08.2008 Bulletin 2008/33

(43)	Date of publication A2:
	16.06.2004 Bulletin 2004/25

(21)	Application number: 03256905.5

(22)	Date of filing: 31.10.2003

(51)

International Patent Classification (IPC):

H01J 23/10^(2006.01)

H01J 25/587^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
	Designated Extension States:
	AL LT LV MK

(30)

Priority:

10.12.2002 KR 2002078049

(71)	Applicant: SAMSUNG ELECTRONICS CO., LTD.
	Suwon-City, Kyungki-do (KR)

(72)	Inventors:
	Shon, Jong-Chull Suwon-City, Kyungki-Do (KR) Rayskiy, Boris V. Paldal-gu, Suwon-City, Kyungki-Do (KR) Ha, Hyun-Jun Paldal-gu, Suwon-City, Kyungki-Do (KR)

(74)	Representative: Robinson, Ian Michael et al
	Appleyard Lees 15 Clare Road Halifax HX1 2HY Halifax HX1 2HY (GB)

(54)	Magnetron, and microwave oven and high-frequency heating apparatus each equipped with the same

(57) A magnetron includes a ring-shaped anode (303), a cathode, an activating space (304), at least one permanent magnet (305) and a magnetic flux carrying unit (306,307,308). The ring-shaped anode (303) forms a plurality of resonance circuits (302). The cathode is disposed at the axial center of the anode (303) to emit thermions. The activating space (304) is formed between the anode (303) and the cathode. The at least one permanent magnet (305) is provided beside the anode (303). The magnetic flux carrying unit (306,307,308) carries magnetic flux generated by the at least one permanent magnet (305) to the activating space (304). A microwave oven and/or high frequency heating apparatus may utilize the magnetron.

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